Desk.



No. 851,659. PATENTED APR. so, 1907. w. GAAIKBMA. DESK.

APPLICATION FILED FEB.28. 1906.

3 SHEETS-SHEET 1.

WNW Wham aaifiamfNl E/VTOR,

I 1; v I i I v A ZTORNEYS PATENTED APR, 30, 19C

W. GAAIKEMA.

DESK.

APPLICATION FILED FEB.28.1906.

3 SHEETE-SHEB W1 TNESSES:

N 851,659. PATENTED APR. 30, 1307,

W. GAAIKEMA.

DESK.

APPLICATION FILED TRB.28.1906.

3 SHEETSfiEIJB'I 3.

UNITED s'rarns PATENT orrion.

WILLIAM GAAIKEMA, or MUSKEGON, MICHIGAN, ASSIGNOR TO MOON DESK 00., or MUSKEGON, MICHIGAN.

DESK.

No. senses.

Specification of Letters 1 atent.

'ratented April 30, 1907.

Application filed February 28, 1906. Serial No. 303,481.

To" all whom it may concern:

Be it known that I, YViLLIAM GAAIKEMA, a citizen of the United States, residing at Muskegon, in the county of Muskegon and State of Michigan, have invented a new and useful Desk, of which the following is a specification.

I Thisinvention relates to desks and cabinets of that general ciass employed for the support of'typ'ewriting machines.

The "object of the invention is to provide means whereby a typewriter support and elevating means therefor may be securely looked when the .sup ort is pulled forward and upward out of tii disengaged from the locking devices on and by the initial movement of the supporting means to allow the latter to be lowered and pushed back into the cabinet.

The invention also comprises novel means for locking the typewriter support in the retracted position in the desk or cabinet against theaction of a springactuated elevating means for the said typewriter support.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novelfeatures of con struction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed .out in the appended claims, it being understood that various changes in the form, pro portions, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

' In the accompanying drawings :Figure 1 is asectionalelevation of a typevniter desk or cabinet constructed in accordance with the invention, the machine supporting table being shown in elevated position. Fig. 2 is a similar view, showing the table concealed withinthe cabinet. Fig. 3 is a detail pers ective view of the machine supporting tab e and spring elevated frame, detached. Fig. 4 is a sectional elevation through a portion of the table and frame, showing the'locking device for preventing movement of the frame until the machine supporting table has been ulled out. Fig. -5 is adetail view on an en arged scale of one of the frame elevating springs and its connections. Fig. 6 is a sectional view, illustratmg a slightly modie cabinet or desk and will be.

fied construction. Fig. 7 is a transverse sectional view oft-he same on the line 7-7 of Fig. 6. Fig.8 is a view corresponding to Fig. 1 and illustrates a spring elevated frame of simple construction.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The desk proper may be of any suitable construction, and preferably is provided with a permanent top 11 that extends over a chamber 12 in which the typewriter or other machine and its support are concealed when in ino erative position, and at the front is a slidab e curtain 15 which may be drawn down to position shown in Fig. 2 in order to exclude dust and dirt.

The opposite side walls of the chamber 12 are provided with cam grooves, each groove havin a straight horizontal portion 16 and an inc ined portion 17, and said cam grooves may be conveniently formed by attaching suitable wooden strips 18 to the vertical walls of the chamber 12.

Arranged within the chamber is a spring elevated frame of the construction best shown in Fig. 3; This-frame includes a air of parallel side bars 20 and 21 connects by transversely extending end bars 22 and 23, and is supported by a series of pivotally connected levers, there being three levers 25, 26 v and 27 at each side of the frame. The rear ends of the levers are connected to the side bars 20 and 21 by means of hinges 2S, and

the lower forward ends of said levers are ro .vided with rollers 30 that are design'ec to travel on metallic track ways 32 which may be formed of strips of metal placed at the bottom of the chamber 12. Each of the levers 25 carries a plate 33, that is provided with an opening for the passage of a spring actuated rod 35 which, also, extends through the levers 25, the opposite ends of the rod being rigidly connected to the levers 26 by means of a transversely-disposed locking pin 36,01 equivalent fastening devices.

At a point intermediate the ends of the rod 35 is arranged a revolubly adjustable collar 37 which may be locked to the rod by a pin 38 extending through openings formed in the collar, and an opening extending through the rod. This collar is provided wlth an arm 40 from which progects'a pin 41 that forms a hearing point for one end of a torsion spring 42 that is mounted on the rod 35, the opposite end of said 5 ring engaging against a pin 43 that is carrie by the plate The function of the spring is to elevate the frame 20, and said spring, therefore, acts to move open or spread the levers from the position shown in Fig. 2 to that illustrated in Figs. 1 and 3. The collars 37 are provided with wrench engaging faces 45 so that they maybe turned 101 the purpose of adjusting the'stress of the springs,- after which the pin 38 is passed through the openings of the collar and rod for the purpose of locking said collar-in adjusted position.

The lower rea ends of levers 26 are connected by atransvhrse bar 46in order to retain said levers in parallel relation, and the ,rupper and'lower ends of the levers are provided with anti-friction rollers 48 that are delsigned to travel on metallic wear strips secured to the bottom of the chamber 12 and to the lower surface-oi the side bars 20 and 21.

Extending through the sets of levers and 27 is'a rod 50', and said rod carries springs 42 which are connected to the rod and to the levers 27 in precisely the same manner as the lever opening springs of rod 35, and these springs tend to assist in moving the frame to elevated position. The upper ends of the levers 27- are arranged to enter lockin notches 52 that are formed in the lower iaces of the strips 20 and 21, and when;

so engaged, it becomes impossible to depress the frame, no matter what loa'd may be added. These levers 27 are connected by a transversely extending rod 53 which serves to maintain the levers in parallelism.

To the rear ends of-the bars 20 and 21 of the frame are secured blocks 54 carrying pins 55 in which small anti-friction rollers 56 are mounted that travelin the cam slots 16-1 7, and serve to guide the frame during its movement, and when these rollers are entered in the horizontal portions 16 of the slots, they serve to maintain the frame in its lowered position, while as soon as the frame is pulled out until the rollers arrive at the juncture of the straight and inclined portions of the slots, the elevating sprin s are free to act on the levers and lnqve the ame upward.

The frame is provided-with small antifriction rollers 57 thatcxtend through suitable slots formed in the bars 20 and 21 and serve as supports for a suitable table 58, the lower face of said table having wear strips 59 with which the rollers may engage. This table' 58 carries a typewriter,'sewing or other machine, and is provided with a pair oi clamps 60, arranged to enga e with the frame of the machine and ho.d the same firmly in place.

die 61 whichmay-be grasped for the purpose of moving the table intoand from the cabi- The outer end of the slid-v able table is provided with an operating hen-- net, and it is essential that this table he moved either forward or rearward before the ironic can move vertically.

To the iiottom ()l' the slidah e {aide are secured two stop lrlocks 63 and or that prcicrah-ly are provided with suitable huliers oi yieldahle material 'or engzzgcnient with. the front and rear transverse bars oi the irame, these stops serving to limit movement 01" the table in both directions.

. The lower tact or the slid able tahle 58 turther carries a pair or cams 67, which during initial rearward inoveinent'ol the table from the position shown in Fig. 1 will engage with 'and depress the cross bar 53 for the purpose of moving the ends of the levers 27 out oi the notches 52, thus permitting downward movement of the frame, but until this slight hackward movement or the tahle is accomplished, the frame is firmly and rigidly locked in elevated position. -The rearward movement of the tahle is at this time limited by a pivotally mounted stop that extends through. a suitable slot formed in the-frame bar 20. he rear end oi the stop 70 is heavier thanits forward end, so that it will normally he maintained lav gravity in the position shown in Fig. 1, the Forward end being disposed in the path of movement of the slidal'ile table, and being arranged to engage the rear edge thereof when the table is moved and descends sutiicient to permit its cam 67 todepress the merit of the tahlefcan he accomplished until, as the frame is depressed, the .stop 70 engages against one or the levers 25, whereupon said stop .is compelled to move to approximately horizontal position, and the table may then he. slid to the rear. This locking of the table from rearward movement until the frame has been depressed, is. or importance in chine coming into engagement with the fixed top 11 of the structure, and prov sion is, also, made rorpreventing the upward movement table has heen first drawn out, so that the typewriting or other machine is prevented from engaging the desk top as the frame rises. To accomplish this locking. of the table and frame, the bar '21 of the frame is provided with an elongated-lever 72, having two arms, of which the rear arm 73 is arranged to engage a locking dogor ear 74 at the lower rear portion of the chamber 12. The forward end of this lever has a cam shaped flange 75 that is disposed in the path o novement oi a cam 76 that depends from the under side of the slidahie table 58. It willhe seen, on reference to Fig. 4, that the frame cannot be pulled out until the table is first moved outward, said tahle being drawn out to the dotted line position-of Fig. 4 until the cam 7 6 engages the flange 75 of the locking lever and moves the same to release position, after which. the

cross bar 53, and t c further rearward move LOO that it prevents the typewriting or other niaof the spring elevated frame until the slidable frame may be drawn out until the rollers 56 are at the juncture of the-portions 16 and 17 of the slots, the springs then accomplishing the further upward and forward movement of the frame.- I

In the construction illustrated in Fi s. 6 and 7, the carrying rollers for table 58 have been omitted, and the table 58 is provided with a pair of cross bars 80 arranged to extend down between the side bars of the rectangular frame, and provided with end tongues that fitwithin guiding grooves 81 formed in said side bars. In this case, also, the anti-friction rollers at the ends of the spring elevated 4 levers may be dispensed with.

In Fig. 8 is illustrated a simple construc-.

tion of the device, in which the auxiliary levers 27 are dispensed with, and levers'26 are pivoted to the main levers 25 by the spring actuated rod. movable frame constitutes the table on which the'typewriting or other machine is supported, and at the sides of said frame are arranged anti-friction rollers 83 for engagement with the inclinedportions of the cam guiding slots, while the'lower and inner ends of the levers 26 are provided with anti-friction rollers'84 that en age the horizontal portions of the guiding s ots. In this construction the upper forward ends of the levers 26 are arranged to enter locking notches formed in the lower face of the table or frame, and in order to release the same and permitlowering of the frame,--a suitable unlocking lever p 86 is employed. The inner end of this lever 86 engages a cross bar 53 that iscarried by the levers 26, while the outer end of the opcrating lever is arranged immediately under the forward edge of the table or frame, so that when the lever is grasped, the releasing lever may be operated to withdraw the ends ofthe levers 26' from the notches, and permit downward movement of the typewriter orsewing machine-s11 pporting table.

In this case the vertically In the construction shown in Fig. 8, the top of the main casing or desk is provided with a hinged portion 11 which may be thrown back for the purpose of allowing the machine to move to operative position, and, when the table is depressed, it may be locked by means of ahook 89, the latter being ar- 1. Ina desk or like structure, interpivoted sets of spring-actuated levers carried by the desk, aframe carried by the interpivoted sets of levers with one set thereof engaging notches inthe frame and thereby locking thelatter in elevated position, a sliding table carried by said frame, and cams carried by said sliding table and positioned forward of said set of levers which engage the notches when the table is pulled forward and in elevatedposition, and adapted to disengage the levers from thenotches on the initlal rearward sliding movementof said table, to allow the lowering of'the frame and table.

2-. In a cabinet structure, a frame, springactuated supporting mechanism for elevating said frame and moving it out of the cabinet, a table slidingly mounted on the frame, a lever pivoted on the frame and having one end arranged to engage. over an element in the cabinet structure to hold the frame depressed,

- a cam head on the other end of the lever, and

a cam mounted on the slidable table and positioned to engage and depress said cam head, and thus disenga e the other end of the lever, near the end 0 the forward sliding movement of said table to allow the said frame and table to rise.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

' ll. GAAIKEMA.

Wfitnesses:

GEO. F. STEVENS, FRANCES. H. BANCROFT.

ranged to engage an eye 90 carried by the 7 rear edge of the table. 

